Circuit/System Description

The transfer case shift control module (TCCM) receives input from the transfer case two/four wheel drive actuator position sensor, also known as the rotational position sensor (RPS). The RPS receives a 5-volt reference signal from the TCCM. In return the RPS sends the TCCM a variable pulse width modulated signal indicating the position of the transfer case actuator. The RPS works in conjunction with the incremental position sensor, inside the transfer case actuator, to confirm actuator position. The RPS is more sensitive than the incremental position sensor and is able to indicate to the TCCM the exact position of the transfer case actuator between modes or ranges changes. It is also able to show how much clutch activation is being commanded at any time.